[gtk+/wip/baedert/gl] snapshot: Fix typo

[Timm Bäder <baedert src gnome org>]

commit 6daa5d721990eaac2e09eed58907391cc39d3a8d
Author: Timm Bäder <mail baedert org>
Date:   Tue Dec 12 20:23:46 2017 +0100

    snapshot: Fix typo

 gtk/gtksnapshot.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtksnapshot.c b/gtk/gtksnapshot.c
index ac18bb5..d632ef6 100644
--- a/gtk/gtksnapshot.c
+++ b/gtk/gtksnapshot.c
@@ -1373,7 +1373,7 @@ gtk_snapshot_append_color (GtkSnapshot           *snapshot,
  *
  * Tests whether the rectangle is entirely outside the clip region of @snapshot.
  *
- * Returns: %TRUE is @bounds is entirely outside the clip region
+ * Returns: %TRUE if @bounds is entirely outside the clip region
  *
  * Since: 3.90
  */